feat(actions): add pytest workflow

.github/workflows/pytest.yml

@@ -0,0 +1,24 @@
+# .github/workflows/app.yaml
+name: PyTest
+on: push
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+
+    steps:
+      - name: Check out repository code
+        uses: actions/checkout@v2
+
+      # Setup Python (faster than using Python container)
+      - name: Setup Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: "3.9"
+
+      - name: Install dependencies
+        run: make install
+
+      - name: Run tests
+        run: make test

README.md

@@ -1,5 +1,7 @@
 # CrunchDAO CLI
 
+[![PyTest](https://github.com/crunchdao/crunch-cli/actions/workflows/pytest.yml/badge.svg)](https://github.com/crunchdao/crunch-cli/actions/workflows/pytest.yml)
+
 CrunchDAO CLI is a Python library designed for the ADIA Lab Market Prediction Competition, offering convenient access to competition's data and enabling effortless submission. When utilized in the command-line interface (CLI), its goal is to deliver a user experience akin to GitHub, enabling you to seamlessly push the code from your local environment.
 
 ## Installation